Bitcoin ETFs Attract $2.39B as Spot Crypto Flows Rise

Weekly snapshot: spot Bitcoin ETFs draw $2.39 billion

U.S. spot exchange-traded funds focused on Bitcoin recorded $2.39 billion in net inflows during the Sep. 21–25 trading week, according to Farside Investors data. The five trading days all posted positive flows, led by an exceptionally strong Monday that accounted for nearly $1 billion of the weekly total. Across the broader spot-ETF landscape, Ether products added $689.8 million and Solana funds attracted $188.1 million, bringing combined net inflows to roughly $3.26 billion for the week.

Daily flow pattern and context

Farside’s daily breakdown shows a front-loaded week for Bitcoin ETFs: Monday’s $999 million was the largest daily inflow, followed by $714.7 million on Tuesday, $346.9 million on Wednesday, $190.7 million on Thursday and $134.5 million on Friday. The week’s inflows marked a material recovery from the previous week’s modest $6.1 million net increase, which itself was affected by sharp withdrawals mid-week on Sep. 15–16.

BlackRock’s IBIT leads Bitcoin ETF demand

BlackRock’s iShares Bitcoin Trust (IBIT) dominated the weekly Bitcoin ETF flows, taking in about $1.16 billion across the five sessions. Fidelity’s FBTC was the second-largest recipient with $701.6 million, while ARK 21Shares’ ARKB added $294.7 million and Morgan Stanley’s MSBT pulled in $203.3 million.

Monday’s inflows were concentrated in the largest products: IBIT received $381.4 million, ARKB $289.1 million and FBTC $238.8 million. On Tuesday, IBIT and FBTC again saw sizable contributions, with $350.3 million and $257.4 million respectively. IBIT posted net inflows every trading day of the week, highlighting persistent demand for the largest spot Bitcoin ETF.

Market observers noted Bitcoin’s price climbed above $87,000 earlier in the week before easing back toward the mid-$80,000s. Fund flow data show steady ETF buying even as BTC’s price retraced, but flows alone do not quantify how much ETF demand versus other liquidity sources drove the price moves.

Ether ETFs reverse prior outflows

Spot Ether ETFs recorded $689.8 million in net inflows over the week, reversing the roughly $140.6 million outflow seen the prior week. The group added $270 million on Monday, followed by $162.2 million, $104.5 million, $66.1 million and $87 million through Friday.

BlackRock’s ETHA led Ether inflows this week with $326.2 million, while Fidelity’s FETH took in $174.1 million. BlackRock’s ETH staking fund ETHB also contributed, adding $47.5 million. Monday proved the strongest single day for Ether products: ETHA drew $110.1 million, FETH $73 million and Grayscale’s lower-fee ETH vehicle collected $59.3 million.

Solana ETFs finish the week with a surge

Spot Solana ETFs attracted $188.1 million in net inflows for the week. Daily Solana ETF flows were steady early in the period—$26 million on Monday and $28.9 million on Tuesday—before accelerating late in the week, culminating in an $86.7 million inflow on Friday.

Bitwise’s BSOL was the largest Solana recipient, accounting for $128.4 million of the weekly total and receiving $55.7 million on Friday alone. Grayscale’s GSOL added $18.5 million on Friday, and Morgan Stanley’s MSOL recorded $6 million.

Aggregate picture and implications for crypto markets

Taken together, Bitcoin, Ether and Solana spot ETFs recorded approximately $3.26 billion in net inflows for Sep. 21–25, with Bitcoin funds representing about 73% of that combined figure. These continued weekly inflows highlight growing investor appetite for regulated spot crypto products, an important trend as institutional and retail demand for regulated Bitcoin and Ether exposure expands.

While ETF flows provide one lens on demand for crypto assets, they are one of several factors—alongside derivatives positioning, OTC trades and macro liquidity—that influence prices. Nonetheless, strong and consistent inflows to large funds such as IBIT and ETHA underscore the concentration of capital in flagship products and the ongoing maturation of the crypto ETF market.